Guidelines:
The Standard
Dialects and accents
Isoglosses
American vs. British English
Hispanic English
Black English
Pidgins and Creoles
Bilingualism
References:
1 our lecture
2 Fromkin, Rodman: An introduction to language, chapter 7 Language in Society, see what you need according to the guidelines above
George Yule: The study of language, chapter 20 Language varieties